Drag scraper



March 4 1924.- 1,485,965

W. H. DANCE DRAG SCRAPER Filed Jan. 9, 1922 Patented Mar. 4%, 1924.

UNITED STATES WILLIAM HQDANCE, OF CAMBRIDGE, MASSACHUSETTS.

. DRAG SCRAPER.

Application filed January 9, 1922. Serial-No. 527,863.

To all whom it may concern:

Be it known that I, WILLIAM H. DANCE,

a citizen of the Dominion of Canada (having declared his intention of becoming a 5 citizen of the United States), residing at Cambridge, in the county of Middlesex and State of Massachusetts, have invented new and useful Improvements in Drag Scrapers,

of which the following is a specification.

This invention relates to scrapers adapted to be drawn overa surface from which material is to be removed, and detach therefrom. a load of material, and transport the load to a point where it is to be discharged.

16 The invention is embodied in the improvements hereinafter described and. claimed, whereby a simple, durable and effective scraper is provided, adapted to freely discharge its load by a backward movement of the scraper.

()f the accompanying drawings forming a part of this specification,

Figure 1 is a top plan view of a scraper embodying the invention.

Figure 2 is a side view of the same.

Figure 3 is a section on line 3-8 of Figure 1.

The same reference characters indicate the same parts in all of the figures.

My improved scraper is a U-shaped bucket, made of suitably thick sheet or plate metal, and provided with U-shaped upper and lower edges 12, either of which is adapted to bear on the ground and constitute a 36 scraping edge, the bucket being invertible,

so that when one edge 12 has been reduced by wear, the other edge may be used as the scraping edge. The bucket has substantially fiat end portions 13, which are perpendicular to the said edges, and constitute the forward portion of the bucket. A curved intermediate portion 14, merging into the side portions, constitutes the rear or gathering portion of the bucket. Said gathering portionis formed to provide a load-retaining recess between the edges 12, at the forward side of the bucket, and is provided with a vent-opening 15, midway between said edges. Said opening permits the escape of water accumulated with a load of solid inatter, when the scraper is used for dredging, the form of the opening being such that it permits water to flow from the rear portion of the scraper, without permitting the objectionable escape of solid matter.

The load accumulated by the scraper may, therefore, r-ise'above the opening 15, and cover the latter. Incase the load is composedof wet material, removed from' under water, the vent-opening prevents adhesion of the load to the recessed intermediate portion of the bucket, when the bucket is moved backward to separate it from the load.

The bucket is preferably composed of tw duplicate sections, having edge portions 16, 55 meeting at the forward portion of the bucket, and edge portions 16 which are spaced apart at the intermediate portion to form the vent-opening 15, the latter being of tapering form, as shown by Figures 2 and 3. Said sections are rigidly connected by external reinforcing members 17, preferably T-shaped, and internal reinforcing members 18, said members being secured by rivets 19.

The forward portion of the bucket is provided with means for engaging a forwardly pulling draft member 20, such as a rope or chain, the preferred means being holes 21, arranged in vertical rows in the reinforced 9 forward end portions, and clevises 22, engaged with alined holes in the said end portions, and adapted to engagethe draft'mernber 20, the holes 21 being at different distances from the edges 12, so that the clevises may be vertically adjusted.

The rear portion of the bucket is pro-- vided with means for engaging a rearwardly pulling draft member 23, the preferred means being looped metal strips 24, secured by rivets 25 to the sections of the bucket, and bridging the vent-opening 15. The bucket is provided with prongs 27 secured by bolts 28, and projecting from the scraping edge to loosen material to be gathered by the bucket. Said bolts and prongs may be removable, so that they may be engaged with either edge portion of the bucket, bolt holes 29 being provided near each edge 12, to receive the bolts 28.

I claim: 1

1. A drag-scraper comprising an invertible bucket, having lower and upper edges, each adapted to bear on the ground, substantially fiat end portions, perpendicular to 105 the plane of said edges, and an intermediate gathering portion, formed to provide a load retaining recess between the upper and lower edges, at the front side of the bucket, and provided with a vent-opening between said no edges, whereby water accumulated with a load is permitted to escape from the back side of the bucket, and air ispermitted to enter the bucket to prevent adhesion of a load thereto, when the bucket is backed.

2. A drag-scraper as specified by claim 1, the forward portion of the bucket being provided with means for engaging a forwardly pulling draft member, and the rear portion with means for engaging a rearwardly pulling draft member.

3. A drag-scraper as Specified by claim 1,

'the bucket being provided with prongs projectin from its lower edge.

t. A dragscraper comprising an invertie ble bucket, having lower and upper edges,

each adapted to bear on the ground, substantially flat end portions, perpendicular to the plane of said edges, and an intermediate gathering portion, formed to provide a load retaining recess between the upper and lower edges, at the front side of the bucket, and

provided with a vent-opening between said edges, whereby water accumulated wlth a load is permitted to escape from the back side of the bucket, and air is permitted to enter the bucket to prevent adhesion of a load thereto, when the bucket is backed, the end portions of the bucketbeing provided with means whereby a forwardly pulling draft member may be engaged with the V essence orovided with a vent-o )enin between said edges, whereby waterjaccuinulated with a load is permitted to escape from the back side of the bucket, and air is permitted to enter the bucket to prevent adhesion of a load thereto, when the bucket is backed, the intermediate portlon being provided with means between the upper and lower edges, whereby a rearwardly pulling draft member may be engaged with the bucket.

6. A drag-scraper as specified by claiml, the bucket being composed 03: two duplicate sections, having edge portions meeting at the forward portion of the bucket, and spaced apart at the intermediate portion to form said vent-opening, and connecting members secured to said sections.

In testimony whereof I have affixed my signature.

WILLIAM H. DANCE. 

